| DEAERATORS AND VACUUM DEGASSERS FOR HEATING, COOLING AND PROCESS SYSTEMS

DOMESTIC | COMMERCIAL | INDUSTRY

600

500

400

300

200

100

0000.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45

diameter [mm]

Num

ber

of b

ubbl

es p

er li

tre

Air: a disruptive factor in fluid systems

After initial venting, a fluid system such as a

heating, cooling or process system will still

contain a lot of micro bubbles and dissolved

gases. And what is more, air will continue to

get in while work is being carried out on the

system and through (micro) leaks. If gases are

not removed, or are not removed sufficiently,

this will lead to commissioning problems,

frequent manual venting, deteriorating pump

performance, unnecessary energy

consumption and so on. The presence and

continuous occurrence of air will also lead to

the creation of corrosion products which start

to roam around the system in the form of

particles. Eventually, this will cause damage

to expensive system components and lead to

system and process malfunctions or even total

failure, things which can be avoided if tackled

individually but which need to be followed up

and lead to unnecessary costs.

Micro bubbles are difficult to trap, and that

is precisely the reason why there are so many

of them.

Air in a system is often the cause of unnecessary complaints, excessive wear and avoidable disruption to processes. Familiar symptoms include reduced efficiency and unnecessary system failure.

This graph shows the number of air bubbles in water as it leaves the boiler and the size of

these bubbles.

Total solutionsSpirotech offers an extensive range of total

solutions for HVAC and process systems:

accessories, additives and advice to ensure

optimum efficiency and guarantee the quality

of the system fluid. These products and

services reduce faults, wear and maintenance

as well as improve system performance and

lower energy consumption. And what is more,

these total solutions provide major benefits

and save time during the design, installation,

start-up and commissioning of systems.

“The presence of air also causes dirt-related problems.”

DOMESTIC | COMMERCIAL | INDUSTRY

How can air get into a system?There are a number of ways in which air can get into a system. The main ones are listed below:

Removing gases from a systemThere are two ways to release gases from fluids and remove them from a system.

Thermal degassing: by means of temperature differences

By increasing the temperature in a system, dissolved gases will release themselves.

A SpiroVent micro bubble deaerator can then remove these separated gases from the fluid.

Vacuum degassing: by means of forced underpressure

With vacuum degassing, part of the system fluid is temporarily put in an underpressure (vacuum)

condition. The gases dissolved in the fluid are released, separated and removed from the system.

When should a vacuum degasser be used?1. For systems with many branches and a low flow velocity. In such systems, the free accumulated

air is often not circulated with the volume flow but will disappear by itself following the

installation of a vacuum degasser thanks to the fluid being made absorptive.

2. When there are slight differences in temperature. In these situations, partially dissolved gases

will be released. An inline degasser will not be effective in this type of situation but a vacuum

degasser will because it is not dependent on the fluid temperature.

3. When an inline degasser cannot be mounted on the system due to practical reasons. A vacuum

degasser can be connected to virtually any point within a system.

William Henry

SpiroVent micro bubble deaerators

* Henry’s Law: “Gas will dissolve in a liquid until there is a balance between the partial pressure of the gas and the pressure in the liquid”. That means that as the temperature rises or the pressure drops, the mass of gases that dissolves in a liquid will be reduced. Therefore at certain points within a system, the amount of gas absorbed or dissolved gas emitted will depend on the pressure and temperature.

SpiroVent Superior vacuum degassers

SpiroVent deaerators: time-saving and effective

At the heart of the SpiroVent is a spiral structure through which the fluid flows. This is the “Spirotube”, which ensures that micro bubbles rise automatically. Although the Spirotube can trap the smallest micro bubbles, it has a very open structure which results in a very low pressure drop.

Benefits of SpiroVent

effectively.

manual venting is much less time consuming.

and above.

pressures and temperatures.

DOMESTIC | COMMERCIAL | INDUSTRY

1. Lifting eyes make installation very easy.

2. Solid construction guarantees a very

long life.

3. The unique Spirotube is the heart. This

component has been specially designed

for optimum separation of air and

micro bubbles and yet offers very low

flow resistance.

4. Drain plug. Also suitable for connecting

a drain valve, temperature sensor or

pressure sensor.

5. The automatic air vent is guaranteed

not to leak and cannot be closed.

Comes with thread for connecting a

vent pipe as standard.

6. Specially constructed air chamber

prevents floating dirt from reaching the

valve and provides sufficient volume to

absorb pressure fluctuations.

7. Drain valve for admitting or releasing

large amounts of air (when filling or

emptying the system) and for removing

floating dirt.

8. Many different connection options.

Brass with compression fittings or

female thread, horizontal and vertical.

Steel with welded ends or flanges.

Because the SpiroVent removes the countless micro bubbles effectively, the system fluid becomes

absorptive. That means that the fluid can then be returned to the system and can absorb gases and

discharge them into the SpiroVent again. Air-related problems become a thing of the past. The main

test and measurement set-up used by Spirotech to develop deaerators is TÜV-approved.

1

2

3

4

5

6

7

8

SpiroVent deaerators are suitable for water and water/glycol mixtures (max. 50%). They can be used

in combination with locally approved chemical additives and inhibitors that are compatible with the

materials applied within the system. Not suitable for drinking water installations.

The standard SpiroVent is suitable for a temperature range of 0 to 110 ºC and for an operating

pressure of 0 to 10 bar. From DN 050, the SpiroVent housing is made of unalloyed steel. The flange

made of brass. Other sizes, materials, pressures and temperatures are available on request.

Flow resistance graph for SpiroVent

Measured values according to Spirotech standard. Values shown are maximum values. Please contact us for

further information.

Add-on sets

Spirotech provides complete add-on sets for

vertical oil and gas boilers with distributors

and mixing groups which are ready for use.

These can be installed between the boiler and

the mixing group.

Insulation

Specially made insulation sets are available for

most deaerators.

Separate literature is available which contains detailed product information. You can also find this information on our website.

Solar applications

Spirotech also offers an extensive range of air

vents and deaerators for solar applications.

100

10

1

0.1

0.01 0.1 1 10

Pres

sure

dro

p (k

Pa)

Flow (l/s) 100 1000

DN50

DN65

DN80 DN

100

DN12

5

DN15

0

DN20

0

DN25

0DN

300

DN35

0DN

400

DN45

0DN

500

DN60

0

22m

m &

G¾

22m

m V

& G

¾ V

G1 G1 ¼

G1V

G1 ½

G2

H (m

m)

L (mm

)

Max. flow

[m3/

h]

Max. flow

[l/s]

p at max. flow

[kPa]

Article num

ber

22 mm. comp. 153 106 1.3 0.35 1.3 AA022

22 mm. comp.V 220 104 1.3 0.35 1.5 AA022V

153 85 1.3 0.35 1.3 AA075

210 84 1.3 0.35 1.5 AA075V

G1 180 88 2.0 0.55 1.3 AA100

G1V 210 84 2.0 0.55 2.4 AA100V

200 88 3.6 1.0 1.3 AA125

234 88 5.0 1.4 1.3 AA150

G2 275 132 7.5 2.1 1.4 AA200

Connection

DOMESTIC | COMMERCIAL | INDUSTRY

An extensive range of SpiroVent deaerators

Optimum system and process water quality is achieved when air and dirt is kept to a minimum. If air and dirt is not removed, or is not removed sufficiently, numerous complaints and problems can arise such as annoying noises, frequent manual venting, deteriorating pump performance, an imbalance in the system, unnecessary disturbance and excessive wear. All these things result in higher energy consumption, complaints and failure and often require immediate action.

Spirotech offers an extensive range of SpiroVent deaerators specially for removing air. All products

can be used for both new build projects and for renovating heating, cooling and process systems.

SpiroVent deaerators are available in brass and in (stainless) steel. The brass separators, suitable

for a flow velocity of up to 1 m/s, can be installed in horizontal and vertical pipes. The steel models

are available in standard (flow velocity ≤ 1.5 m/s) and hi-flow designs (flow velocities ≤ 3 m/s).

Brass, horizontal: 22 mm up to 2”

Brass, vertical: 22 mm up to 1” V = Vertical connection Flow velocity ≤ 1 m/s

Operating pressure: 0 - 10 bar Fluid temperature 0 - 110 °C

Other sizes, materials, pressures and temperatures are available on request

Select the correct SpiroVent:1. Determine the pipe diameter.

2. Determine the flow.

3. Determine the correct model using the table.

A SpiroVent deaerator is preferably to be installed at the hottest point within a system. In the case

of a heating system, for example, this is the point where the water exits the boiler. In the case of a

cooling system, it is in the return before the chiller unit.

Standard: DN50 to DN600

Hi-flow: DN50 to DN600

Standard type (1.5 m/s) Hi-flow type (3 m/s)

Connection [D

N]

Connection O

D [m

m]

L (mm

)

LF (mm

)

H (m

m)

Max. flow

[l/s]

Max. flow

[m3/

h]

p at max. flow

[kPa]

Article num

ber

H (m

m)

Max. flow

[l/s]

Max. flow

[m3/

h]

p at max. flow

[kPa]

Article num

ber

050 60.3 260 350 470 3.5 12.5 3.0 BA050 630 7 25 11.8 HA050

065 76.1 260 350 470 5.5 20 2.7 BA065 630 11 40 11.6 HA065

080 88.9 370 470 590 7.5 27 2.9 BA080 785 15 54 12.4 HA080

100 114.3 370 475 590 13 47 3.7 BA100 785 26 94 14.6 HA100

125 139.7 525 635 765 20 72 4.2 BA125 1045 40 144 16.8 HA125

150 168.3 525 635 765 30 108 4.9 BA150 1045 60 215 19.4 HA150

200 219.1 650 775 975 50 180 5.8 BA200 1315 100 360 23.1 HA200

250 273.0 750 890 1215 80 288 6.9 BA250 1715 160 575 27.7 HA250

300 323.9 850 1005 1430 113 405 7.7 BA300 2025 225 810 31.0 HA300

350 356 NA 1100 1910 140 500 7.8 BA350 2400 280 1000 31.0 HA350

400 406 NA 1200 2120 180 650 8.4 BA400 2680 360 1300 34.0 HA400

450 457 NA 1300 2320 235 850 10.0 BA450 2960 470 1700 39.0 HA450

500 508 NA 1400 2540 295 1060 11.0 BA500 3250 590 2120 43.0 HA500

600 610 NA 1600 2980 425 1530 12.0 BA600 3830 835 3000 47.0 HA600

Operating pressure: 0 - 10 bar Fluid temperature 0 - 110 °C

Other sizes, materials, pressures and temperatures are available on request.

Max. flow m3/h and l/s Applicable SpiroVent

m3/h

12.5

20

25

27

40

47

54

72

94

108

144

180

215

288

360

405

500

575

650

810

850

1000

1060

1300

1530

1700

2120

3000 Standard

Hi-flow

3.5

5.5 7 7.5

11

13

15

20

26

30

40

50

60

80

100

113

140

160

180

225

235

280

295

360

425

470

590

835

DN050 BA050 HA050

DN065 BA065 HA065

DN080 BA080 HA080

DN100 BA100 HA100

DN125 BA125 HA125

DN150 BA150 HA150

DN200 BA200 HA200

DN250 BA250 HA250

DN300 BA300 HA300

DN350 BA350 HA350

DN400 BA400 HA400

DN450 BA450 HA450

DN500 BA500 HA500

DN600 BA600 HA600

= choose bigger Ø or lower the flow

l/s∅

Other sizes, materials, pressures and temperatures are available on request.

Standard

Hi-flow

DOMESTIC | COMMERCIAL | INDUSTRY

SpiroVent Superior vacuum degassers: effective and efficient

The SpiroVent Superior is a fully automatic vacuum degasser for heating, cooling and process systems. Because of the fully electronic control system, the Superior offers numerous facilities for reading system information, status and logged data.

The SpiroVent Superior is supplied ready to use, with flexible connection hoses fitted with coupling

nuts. The device can be installed, connected and commissioned quickly and easily on any individual

installation.

How the SpiroVent Superior worksA continuously operating pump constantly takes a quantity of system fluid from the circulating

flow. Closing a solenoid valve creates a vacuum so that the dissolved gases are released.

These accumulate at the top of the vessel and are removed via the air vent. The degassed and

absorptive fluid is then pumped back into the installation and can start absorbing gases again.

There are various reasons why gas will always be able to enter a system, such as diffusion,

micro leaks and expansion system membranes which are never 100% gastight. Because of all this,

vacuum degassing is a continuous requirement. It is therefore not a one-off process.

Benefits of SpiroVent Superior

trapped gas bubbles.

delivery times.

sustained pressure.

as heat pump systems and underfloor

heating systems.

systems.

common expansion systems.

S10, for heating or cooling systems from

5 to 10 bar, up to 300 m3

S16, for heating or cooling systems from

9 to 16 bar, up to 300 m3

S3, for heating or cooling systems up to

3.5 bar, up to 15 m3

S6, for heating or cooling systems up to

6 bar, up to 300 m3

Pressure monitoring and refilling

All SpiroVent Superior vacuum degassers can be supplied with an automatic refill function which continuously monitors the system pressure. As soon as the pressure falls below the set value, the refilling process will start. The refill fluid is degassed before being pumped into the system. Once the desired value has been reached, the refilling process stops and the Superior resumes the normal degassing process.

This is a simplified graph showing measurements taken from various systems in practice. During initial degassing and

after initial commissioning or when restarting a system, the gas level is reduced to the minimum level. The Superior

then switches itself off and the gas level slowly increases again. By switching on the Superior at set intervals, the gas

level is kept at the minimum level so that problems are prevented.

Energy-efficient thanks to SmartSwitchAs soon as any gases are removed, it is registered by the integrated SmartSwitch. If the SmartSwitch

has not registered anything for ten minutes, it means that the quantity of dissolved gases in the fluid

has reached the minimum value. The degassing process will then stop automatically and start again

at the next pre-set time. So the device is only operated when necessary. As a result, energy

consumption is reduced considerably and the life of costly components is extended significantly.

A SpiroVent Superior is always connected to the main pipe of a system as a bypass. As the Superior

releases, separates and removes dissolved gases, it can be connected virtually anywhere in the system.

However, the recommended connection point for the Superior is on the return pipe of the system.

All SpiroVent Superior vacuum degassers

have a fully electronic control system

with a user-friendly interface.

Various parameters can be adjusted

quickly and easily including:

Special insulated versions of the S6,

the S10 and the S16 are available for

cooling applications.

ml/l

T

Dissolved gases (theory)

Dissolved gases (in practice)

Minimum level

Gases removed (cumulative) (l)

Superior On0

DOMESTIC | COMMERCIAL | INDUSTRY

An extensive range of SpiroVent Superior Vacuum Degassers

Optimum system and process water quality is achieved when air and dirt is kept to a minimum. If air and dirt is not removed, or is not removed sufficiently, numerous complaints and problems can arise such as annoying noises, frequent manual venting, deteriorating pump performance, an imbalance in the system, unnecessary disturbance and excessive wear. All these things result in higher energy consumption, complaints and failure and often require immediate action.

Spirotech offers an extensive range of SpiroVent Superior vacuum degassers specially for removing

air. All products can be used for both new build projects and for renovating heating, cooling and

process systems. Superior vacuum degassers are available in a variety of designs, depending on

system volume, pressure and desired functionalities.

SpiroVent Superior vacuum degassers are suitable for water and water/glycol mixtures (max. 40%).

Not suitable for drinking water.

S3A S3A-R S6A S6A-R S6A-R2P S10A S10A-R S16A S16A-R

Max. system volume [m3] 15 15 300 300 300 300 300 300 300

System pressure [bar] 1 - 3.5 1 - 3.5 1 - 6 1 - 6 1 - 6 5 -10 5 - 10 9 - 16 9 - 16

Temperature of system fluid [°C] 0 - 70 0 - 70 0 - 90 0 - 90 0 - 90 0 - 90 0 - 90 0 - 90 0 - 90

Fluid treated (degassed) [l/h] 70 70 1.000 1.000 1.000 1.000 1.000 1.000 1.000

nvt 50 nvt 450 450 nvt 500 nvt 500

nvt ≥ 0,5 nvt 0 - 6 0 - 6 nvt 0 - 10 nvt 0 - 10

Ambient temperature [°C] 0 - 50 0 - 50 0 - 40 0 - 40 0 - 40 0 - 40 0 - 40 0 - 40 0 - 40

Dimensions [HxWxD] 490x340x340 490x340x340 880x590x350 880x590x350 880x590x350 1272x744x400 1272x744x400 1272x744x400 1272x744x400

Noise level [dB(A)] 49 49 57 57 57 60 60 60 60

Empty weight [kg] 16 17 57 59 67 77 79 87 89

Supply voltage [V] 230 230 230 230 230 3 x 400 3 x 400 3 x 400 3 x 400

Power consumption [watt] 40 40 800 800 1300 1150 1150 2250 2250

Degree of protection [IP] X 4D X 4D 44 44 44 X 4D X 4D X 4D X 4D

Article number MA03A MA06A50 MA06P50 MA10A50 MA16A50

Type

Real-life examples

Spirotech steals the show in MoscowDuring a comprehensive renovation of the prestigious ‘Moscow State Circus’, the extensive heating

system was also worked on. In the process, a number of situations arose which presented the

management with problems. A specialist who was called in had had good experience of Spirotech

products and recommended that they should be used here too. The head of the technical department

Reliable power generation thanks to SpiroVent deaerators

are of paramount importance to this process. An ingenious cooling water system was created

for cooling the cylinders, a critical process. It is extremely important for the cooling water to be

continuously deaerated effectively, as air in the cooling water system will lead to problems and

sometimes to the complete failure of a generator. The result: damage to the costly installation and

time-consuming repairs. SpiroVent deaerators prevent this. They provide effective protection for

the engine cooling process and help to ensure a continuous flow through the system.

Diminutive Superior solves major problem In a three-storey apartment complex, air was causing a lot of problems in the systems. In particular

on the top floors, occupants had been complaining about discomfort caused by poorly heated

radiators. The installer lost a lot of time in continuously having to deal with complaints. Installing a

SpiroVent Superior S3 rectified the problems and the occupants are now able to enjoy a significantly

higher level of comfort.

The use of Spirotech products ensures fewer problems and disruptions and consequently fewer complaints. The products also protect the system so that it will have a longer life.

A comfortable environment for artistes,

animals and the public.

SpiroVent deaerators protect critical

engine cooling process.

Occupants are happy now that the

SpiroVent Superior S3 has been installed.

Custom-made solutions and OEM applicationsSpirotech offers not only standard products. If necessary, we work with customers to produce

custom-made solutions. These are based on users’ specific requirements. If desired, these can

also be supplied as OEM products.

Digital supportProduct data sheets, standard specification texts, line drawings, CAD symbols, project descriptions,

etc. are available via our website.

Separate literature is available which contains detailed product information. You can also find this

information on our website.

14.3

78-0

3/09

09

Spirotech designs and produces innovative total solutions for conditioning fluids in HVAC and

process systems. Our products and services reduce faults and wear, less maintenance is required,

performance is improved and energy consumption is reduced.

Spirotech is deservedly regarded as the only real specialist in the world. Leading manufacturers of

system components recommend Spirotech products on account of their high standard of quality and

the company’s vision on product development and process improvement.

Thanks to a very extensive international network of suppliers, users all over the world enjoy the

benefits of our products and services every day.

Spirotech is a Spiro Enterprises company.

Spirotech: accessories, additives and advice

Spirotech UK Ltd.P.O. Box 109 Glossop

Derbyshire SK13 1WT

Phone: +44 (0)208 451 3344

Fax: +44 (0)208 451 3366

E-mail: info@spirotech.co.uk

Internet: www.spirotech.co.uk

Spirotech bvP.O. Box 207

5700 AE Helmond, The Netherlands

Tel.: +31 (0)492 578 989

Fax: +31 (0)492 541 245

E-mail: info@spirotech.nl

Internet: www.spirotech.com

The diagrams and situations presented in this brochure are only intended to serve as examples. We would be pleased to advise you on any specific situations. Modifications and printing/typographic errors reserved. ©Copyright Spirotech bv. No part of this publication may be used without prior written permission from Spirotech bv.